Steam links not showing for game collections

Hello !

I found out that there are no steam store link on game collections giveaways.

I'v got this two example :

http://www.steamgifts.com/giveaway/72eHz/just-cause-collection

http://www.steamgifts.com/giveaway/el8H0/saints-row-ultimate-franchise-pack

EDIT :
But this game collection shows the store link :

http://www.steamgifts.com/giveaway/1EKiE/red-faction-collection